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Method call if not null in C#
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From C# 6 onwards, you can just use:
MyEvent?.Invoke();
or:
obj?.SomeMethod();
The ?. is the null-propagating operator, and will cause the .Invoke() to be short-circuited when the operand is null. The operand is only accessed once, so there is no risk of the "value ...
Calculate size of Object in Java [duplicate]
I want to record how much memory (in bytes, hopefully) an object takes up for a project (I'm comparing sizes of data structures) and it seems like there is no method to do this in Java. Supposedly, C/C++ has sizeOf() method, but this is nonexistant in Java. I tried recording the free memory in the...
Why do people write the #!/usr/bin/env python shebang on the first line of a Python script?
It seems to me like the files run the same without that line.
21 Answers
21
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How to add a TextView to LinearLayout in Android
I am trying to add TextViews to my xml-defined layout in code.
I have a xml-sheet, where a lot of Views are defined. But I have to add some views in code, so a create a LinearLayout in the xml-sheet:
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Why is the asterisk before the variable name, rather than after the type?
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They are EXACTLY equivalent.
However, in
int *myVariable, myVariable2;
It seems obvious that myVariable has type int*, while myVariable2 has type int.
In
int* myVariable, myVariable2;
it may seem obvious that both are of type int*, but that is not correct a...
What's quicker and better to determine if an array key exists in PHP?
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Do you have specific resources claiming isset is faster?
– Francesco Pasa
Jul 28 '16 at 7:02
1
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Force TextBlock to wrap in WPF ListBox
I have a WPF listbox which displays messages. It contains an avatar on the left side and the username and message stacked vertically to the right of the avatar. The layout is fine until the message text should word wrap, but instead I get a horizontal scroll bar on the listbox.
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How to initialize array to 0 in C?
I need a big null array in C as a global. Is there any way to do this besides typing out
2 Answers
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How to view hierarchical package structure in Eclipse package explorer
OK here's what I would like: in the Eclipse package explorer, I see the following: (dot represents a clickable arrow that I can use to expand the folder)
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What does a . in an import statement in Python mean?
I'm looking over the code for Python's multiprocessing module, and it contains this line:
2 Answers
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